Naruto: Fatherhood Made me Invincible Novel

An ordinary Konoha orphan no longer—Uchiha Kagami awakens the "Many Children, Many Blessings" system on his wedding night with Uchiha Rinne, forever altering his destiny. Through this extraordinary power, his children draw legendary templates from across dimensions, with Kagami gaining tenfold strength from each child's inherited abilities. As the Uchiha clan massacre looms ever closer, Kagami struggles against impossible odds to shield his wife and unborn child from certain death. Salvation arrives when his child manifests the Ryomen Sukuna template, bestowing god-like destructive power. When Itachi executes the massacre, Kagami becomes an invincible force—annihilating all who oppose his family while carving his path toward the Hokage throne.